Link that's beneath Tory leader (3)
I believe the answer is:
tie
'link' is the definition.
('tie' can be a synonym of 'link')
'that's beneath tory leader' is the wordplay.
'that's' becomes 'ie'.
'beneath' says to put letters next to each other (in a down clue).
'tory leader' becomes 't' (I've seen this in other clues).
'ie' put after 't' is 'TIE'.
(Other definitions for tie that I've seen before include "11 [KNOT]" , "Equal scores" , "Fasten; draw" , "Knot; limit" , "Draw for neckware" .)